Leetcode 1353. Maximum Number of Events That Can Be Attended

Given up to 1e5 intervals [start,end] where you can attend an event on any integer day within its range but only one event per day, find the maximum number of events you can attend. This is a scheduling/greedy problem: assign each day to the available event with the earliest end time (commonly done by sorting starts and using a min‑heap of end days) to maximize attendance.